and investigations of a group of militants in the country who were possibly linked to al qaeda in pakistan, unclear whether that has any relation to this attack today. but that is the background in the threat environment, randi. >> paul, your expertise invaluable to us. thank you very much. >>> a major development concerning the military's don't ask, don't tell policy. we'll tell you more right after this. >>> a massive explosion ripped through norway's capital today. at least seven people were killed. the blast shattered government buildings in oslo leaving streets littered with glass and debris. no one claiming responsibility just yet. in another development, a person dressed as a policeman opened fire at a youth camp. there are reports of many wounded and at least one person arrested. police say they have good reason that there's a link between the attack and the explosion in oslo. listen to what the president just said about this. >> i wanted to personally extend my condolences to the people of norway. and it's a reminder that the entire international community has a stake in preventin